San Ysidro Residents Brace for a Busier Border

Hemmed in by three freeways and backed up against the border and port of entry, San Ysidro residents are exposed to an unceasing stream of air pollution from millions of vehicles passing through the community that is the busiest gateway to Mexico.

Over the years residents have expressed concern about the air pollution, pointing to an unusually high number of asthma cases.